What does the PCM do on a 1998 Jeep Cherokee?
One function of the Jeep Cherokee PCM is to control fuel injection and determine the right time to switch gears. If the PCM is faulty, it can lead to stalls or rough idling. Unfortunately, this is part of the 1998 Jeep Grand Cherokee PCM problems, and one of the most frustrating issues owners had to address.
Why is my Jeep Grand Cherokee not starting?
Like the Check Engine light issue, this part of the 1994 Jeep Grand Cherokee PCM problems stems from a faulty PCM providing wrong input to the vehicle. When this happens, ignition or starting issues occur. If your PCM is defective to a point where it cannot make adjustments to the timing or air-to-fuel ratio, then your Jeep may not even start.
Are there any issues with the Jeep Cherokee?
With the Jeep Cherokee in particular, owners have come across issues they’ve encountered with it. It shows random error codes. The engine stalls or misfires. The check engine light comes on. The vehicle has difficulty starting. The engine has performance issues. There is damage to the circuit board. There are transmission issues.
Why is My Check Engine light turning on on my Jeep Cherokee?
The PCM may provide wrong inputs, which leads to other problems. Among these are engine light issues and power steering, according to Jeep Cherokee owners. The Check Engine light turning on randomly tops the list. Reasons that your Check Engine light turning on include emissions problems, faulty O2 sensors, and problems with the PCM.
What’s the difference between ECM and PCU in a jeep?
The Jeep Engine Control Module, known as the PCM ( Powertrain Control Module) ECU ( Electrical Control Unit ) or to simply it put the Automotive Engine Computer . Confusing right? If you would like to know more about their differences you can read up on our previous post ” Difference between ECM, ECU & PCM ” which we covered it in details.
What to do if your Jeep PCM is not working?
As an experienced Electronics Engineer, I have gone the extra step and added the use of a deoxidizer on the connectors, which will protect the connections as well as increase their electrical integrity. I have personally used this cure myself on several Jeeps having been a longtime Jeeper with myfirst being a 76 Cherokee S.
Where is the engine control module on a jeep?
The Jeep Engine Control Module, known as the PCM (Powertrain Control Module) ECU (Electrical Control Unit) or to simply it put the Automotive Engine Computer.
What causes a jeep PCM failure?
- your Jeep’s PCM may not recover from the jolt.
- thermal stress and vibrations can play a part in the failure of your PCM.
- Faulty Equipment.
Where is the PCM on a 1997 Jeep Cherokee?
Where is the pcm located on a 1997 jeep cherokee. The pcm is bolted to the firewall inside the engine compartment on the passenger side behind the coolant recovery bottle.
What is a PCM in a Jeep Wrangler?
by Jen Davis. The Powertrain Control Module (PCM) in your Jeep is designed to serve as the brain of your vehicle’s engine. The PCM is what is often referred to as your Jeep’s “computer.”.
What are the specifications of a Jeep Grand Cherokee?
Jeep Grand Cherokee Dimensions 4828 mm in length, 1943 mm in width and 1802 mm in height with a wheelbase of 2915 mm. Jeep Grand Cherokee has 206 mm of ground clearance and comes with 20-inch wheels.
Why is my Jeep PCM not working properly?
If the problem was only with the scanner connection, the jeep would at least run normally. Now these 2 problems combined would lead to think that there is some electrical connection problem with the PCM. I would disconnect the battery and then disconnect and clean the PCM connectors with electrical contact cleaner.
Can you test a 60 pin PCM on a jeep?
Here are some very important safety precautions when testing the wires coming out of the 60 pin PCM connector. If one or any of the wires on your Jeep Grand Cherokee DO NOT match the color stated in the pin out charts, then you should not use the pin out charts in this article.
What is a PCM module?
A powertrain control module (PCM), also known as the engine control unit (ECU) or module (ECM), is an electronic device that regulates many of a vehicle’s important functions and has a direct impact on how well the car runs. It takes in information about various systems from sensors and other sources…
What is a PCM board?
PCM or PCB ( protection circuit module or board ) is “heart” of Li-Ion battery pack. It will protect Li-Ion battery pack from overcharging, over-discharging and over-drain, therefore it is must have to avoid Li-Ion battery pack from exploding, firing and damage.
How to replace a crankshaft sensor from under the dash?
How to Replace a Crankshaft Sensor from UNDER THE DASH for a Jeep Grand Cherokee (1999 shown) – YouTube If playback doesn’t begin shortly, try restarting your device.
What does the computer do on a Jeep Grand Cherokee?
The Jeep power train control module (PCM)–or computer, as it is known in layman’s terms–controls the vehicle’s ignition, emission and fuel systems, along with other auxiliary systems necessary to the operation of the drive train.